440242431 has 16 divisors (see below), whose sum is σ = 596044800. Its totient is φ = 288988128.

The previous prime is 440242423. The next prime is 440242447. The reversal of 440242431 is 134242044.

It is a happy number.

It is not a de Polignac number, because 440242431 - 2³ = 440242423 is a prime.

It is a super-2 number, since 2×440242431² = 387626796105579522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440242631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91750 + ... + 96428.

It is an arithmetic number, because the mean of its divisors is an integer number (37252800).

Almost surely, 2^440242431 is an apocalyptic number.

440242431 is a deficient number, since it is larger than the sum of its proper divisors (155802369).

440242431 is a wasteful number, since it uses less digits than its factorization.

440242431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 440242431 is about 20981.9548898571. The cubic root of 440242431 is about 760.7301564392.

Adding to 440242431 its reverse (134242044), we get a palindrome (574484475).

The spelling of 440242431 in words is "four hundred forty million, two hundred forty-two thousand, four hundred thirty-one".